Chemistry: analytical and immunological testing – Condition responsive control
Patent
1990-03-02
1992-12-15
Johnston, Jill A.
Chemistry: analytical and immunological testing
Condition responsive control
208 65, 208138, 585310, G01N 3500
Patent
active
051716917
ABSTRACT:
A method is provided of selecting operating parameters for a reforming process having at least penultimate and final reforming stages, each containing a respective catalyst, for optimum OB/CD production of product reformate having a selected RON and/or over a particular run length. The catalyst lives are determined at constant LHSV for the penultimate and final stage catalysts for a give feed octane to each stage as a function of the change in RON from that of the feed to that of the C.sub.5 + effluent from the respective stage. The penultimate stage C.sub.5 + effluent RON is selected to be such that the lives of the catalysts in each stage are substantially equal. Preferably the yield of C.sub.5 + effluent from each stage and the life of the catalyst used in each stage is determined as a function of the reforming pressure of that stage. The operating pressures of the stages are then selected to be within about 30% of that which gives the highest OB/CD.
REFERENCES:
patent: 4922048 (1990-05-01), Harandi
patent: 4927525 (1990-05-01), Chu
patent: 4929332 (1990-05-01), Moser et al.
patent: 4929333 (1990-05-01), Moser et al.
patent: 4985132 (1991-01-01), Moser et al.
patent: 5073250 (1991-12-01), Kline et al.
Kline Jules M.
Miller Stephen J.
Mulaskey Bernard F.
Chevron Research and Technology Company
Johnston Jill A.
Touslee Robert D.
Turner W. Keith
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